def _get_synced_timings_global(self, slide_data, original_audio, slide_audio, samplerate):
global_offset = correlate.get_offset(original_audio, slide_audio, samplerate)
logger.info("Found offset %s", global_offset)
updated_slides = []
for slide_time, slide_name in slide_data.items():
slide_time = slide_time - global_offset
updated_slides.append((slide_time, slide_name))
return sorted(updated_slides)
def work(f1, f2):
print "Loading first audio..."
file1_audio, file1_orig_sr = utils.get_audio_from_file(f1)
print "Preprocessing first audio..."
file1_audio, file1_sr = sync.preprocess_audio(file1_audio, file1_orig_sr, bandpass=False)
print "Loading second audio..."
file2_audio, file2_orig_sr = utils.get_audio_from_file(f2)
print "Preprocessing second audio..."
file2_audio, file2_sr = sync.preprocess_audio(file2_audio, file2_orig_sr, bandpass=False)
print file1_sr, " - ", file2_sr
global_offset = correlate.get_offset(file1_audio, file2_audio, file1_sr)
print "Found offset", global_offset
def find_offset(target, source, source_offset):
"""
Finds piece of source file around source_offset in target file
target - File in which to match the piece (file path or (numpy array, samplerate) tuple of preprocessed samples)
source - File to extract piece of file from (file path or (numpy array, samplerate) tuple of preprocessed samples)
source_offset - offset of piece of interest in source file (in seconds)
Returns offset in target file in seconds
"""
if isinstance(target, basestring):
logger.debug("Target file passed as filepath, loading...")
target_audio, target_samplerate = utils.get_audio_from_file(target)
target_audio, target_samplerate = preprocess_audio(
target_audio, target_samplerate)
logger.debug("Loaded.")
else:
target_audio, target_samplerate = target
if isinstance(source, basestring):
logger.debug("Source file passed as filepath, loading...")
source_audio, source_samplerate = utils.get_audio_from_file(source)
source_audio, source_samplerate = preprocess_audio(
source_audio, source_samplerate)
logger.debug("Done.")
else:
source_audio, source_samplerate = source
assert target_samplerate == source_samplerate
# Take 20 second stretch of audio to look for correlation
start_index = max(0, (source_offset * source_samplerate) -
((WINDOW_SIZE * source_samplerate) / 2))
end_index = min(
len(source_audio) - 1, (source_offset * source_samplerate) +
((WINDOW_SIZE * source_samplerate) / 2))
source_slice = source_audio[start_index:end_index]
offset, correlation = correlate.get_offset(source_slice, target_audio,
source_samplerate)
return offset
